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--- May we leave the classroom now?
--- No, you ____________ . You ____________ to leave before the bell rings.
A.mustn’t, are allowed B.don’t have to, are allowed
C.needn’t, aren’t allowed D.can’t, aren’t allowed
D
mustn’t 语气非常重,表示“一定不要,禁止”等,一般不轻易用;can’t语气相对轻一些,常常用作may的否定;另外,当may表示推测“可能”时,其否定为:may not。跟据上文可知,D为最佳答案,不,你不能。铃响之前不许你离开。
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